Machine for making lock washers



Jaime 10, 1924.

A. A. BERTRAND MACHINE FOR MAKING LOCK WASHERS Filed July 20.

1921 3 SheetsSheet 1.

Eluoanlioz among:

A. A. BERTRAND MACHINE FOR MAKING LOCK WA SHERS Filed July 20. 1921 3 Sheets-Sheet 2 June 10, 1924,

1,497,288 A. A. BERTRAND MACHINE FOR MAKING ocx WASHERS Filed July 20 1921 3 Sheets-Sheet 3 L i L Patented June 16, 1924. I

] MTED [sures PATENT OFFICE,

AL'DRICK A. BERTRAND, 03F MILWAUKEE, WISCONSIN,

MACHINE ron MAKING noon WASHERS.

Application filed. July 20,

tion for forming a coiled strip and for cut- 7 ting the convolutions of this strip to produce the lock washers. Another object is to provide an automatically operating device which can be operated from a machine in common use. A further object is to provide a mechanism which is adjustable to cut the desired number of convolutions of the coiled strip at a time. A still further (object is to provide coiling rolls which cooperate with a mandrel to coil a metal strip thereabout, and furthermore, which efiect an advance of the forward end of a convolution of the coiled strip. Other objects of the invention reside in the novel arrangements and combinations of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a side elevation partly in section of a machine embodying my invention;

Figure 2 is an end view thereof;

Figure 8 is a sectional elevation of a portion of the machine, disclosing the construction for adjusting the coiling rolls toward or away from the mandrel, and also the arrangement for rotating the various parts;

Figure 4 is a cross section through the coiling rolls.

The machine for making lock washers comprises the coiling device 1 and the shearing device 2 which are mounted upon the base 3 which is adapted to be positioned with respect to a machine in common use, such as a punch press to operate boththe coiling and shearing devices. V

The coiling device comprises the feed rolls 1 and 5, between which the metal strip 6'is passed through theguides 7 and 8. These feed rolls feed the metal strip above the mandrel9. For coiling this strip about the mandrel the coiling rolls 10 and 11 are provided havingcylindrical surfaces ,12 and 13 adjacent to and in rear of the mandrel, the

1921. Serial N0. 486,104.

arrangement being such that as the strip 6 1s fed forward it firstengages the cylindrical surface 12 of the upper coiling roll '10, which bends the strip downward about the mandrel when the strip then engages the cylindrical surface 13 of the lower coiling roll 11 which surface bends the strip so that it coils about the mandrel.

In order to advance the forward end of a convolution of the coiled strip and thereby advance the same longitudinally outward upon the mandrel the upper coiling roll 10 has the radial shoulder ll which extends outward beyond the cylindrical bearing surface 12 and also has the inwardly bevelled surface 15 extending from the outer edge of the radial shoulder 14:. The forward end of the coil convolution is initially guided by hand from the mandrel against the bevelled surface 15 of the upper roll 10 which will advance the same automatically about and along the mandrel.

The feed rolls 4 and 5, coiling rolls 10 and 11 and the mandrel .9 are positively rotated 30 and, as shown in Figures land 3, 16 is'a gear wheel mounted on the shaft 17, which shaft carries the upper feed roll a. This gear wheel is driven through suitable ratchet mechanism 18 having a plunger 19 adapted to be driven from a suitable part of the punch press. 20 is a gear also mounted upon the shaft .17 and between the gear wheel 16 and the feed roll 1. This gear .20 meshes with a gear 21 which rotates the lower feed roll 5 on the shaft 22.

V The gear 20 also constantly rotates the coiling rolls 10 and 11 and at the same time permits relative movement of the latter with respect to the mandrel 9. gear 20 is in mesh with the idler gear 23, which latter meshes with the gear 24 secured to the same shaft 25 as the upper coiling roll 10. Thegear 24 in turn meshes with the idler gear 26, which latter meshes with the gear 27 secured to the same shaft 28 as the lower, coiling roll 11, i The mandrel 9 is also rotated as by means of the gear '29 upon the shaft 30 and in mesh with the gear wheel 16, the man.-

vdrel being held the shaft by the collet- 30. lVith this arrangement of gearing the feedrolls 4L and 5 are rotated respectively in counter clockwise and clockwise directions to thereby properly advance the metal strip 0 6, and the mandrel 9 is rotated in a clockwise direction and the coiling rolls 10 and In detail, the 95 11 are each rotated in a counter-clockwise direction thereby properly bending the metal strip 6 to coil the same about the mandrel.

For adjusting the coiling rolls 10 and 11 toward and away from the mandrel 9 their shafts 25 and 28 are rotatably mounted in parallelism to each other in the frame 31 which has a sliding engagement with the main frame 31 of the coiling device 1. The idler gear 26 in mesh with the gears 24 and 27 for the coiling rolls 10 and 11 is also pivotally mounted in this frame, as at 32. This pivot is engaged by the link 33 which has the elongated aperture 34 surrounding the shaft 30. The outer end ofthe link 33 is threaded and is adapted for engagement by the hand wheel 35 for moving the link in either direction. I retained at all times in mesh with the gears 20 and 24 by means of the arms 36 which are pivoted concentric with the shaft 25 and carry the pivot 37-for the idler gear 23. This pivot slidably engages in the elongated aperture 38 in the side of the main frame 31'.

39 is an anvil in axial alignment with the mandrel 9 adapted to be engaged by the coiled strip 6 passing of]? the mandrel. To secure exact alignment the main frame 31 of the coiling device is slidably mounted upon the base 3 to be movable.transversely of the axis of the anvil. This anvil is'longitudinally movable andcooperates with the shearing member 40 movable transversely thereof and adapted to be actuated from the same machine which actuates the plunger 19.

41 is a housing secured to its base 42, this housing enclosing the plunger 43 in which is secured the collet 44, in turn carrying the anvil 39. The housing 41 is provided with the elongated aperture 45 in its side through which is adapted to extend the securing means, such as the cap bolt 46, which passes through the plunger 43, collet 44 and engages the anvil 39. At the rear end of the plunger 43 is pivotally mounted the roll 47 which is adapted to be engaged by the cam 48 secured to the shaft 49 driven by the bevel gear 50, which in turn is driven from the bevel gear 51 rotated by suitable means (not shown). The cam 48 is so shaped that it longitudina-lly moves the plunger 43 inward, and consequently the anvil, in relation to the mandrel 9. For moving the plunger longitudinally outward the coil spring 52 is provided at the base of. the housing 41 and adapted to engage the bracket 53 secured to the plunger. The arrangement of parts is such that the cam and spring alternately move the anvil, and furthermore, after the anvil has been moved longitudinally inward it is retained in this position a sufficient time to be engaged by the coiled strip and to permit The idler gear 23 is:

of downward movement of the shearing member 40 to cut the convolutions of the coiled strip. After operation of the shearing member the cam will have rotated to permit of outward movement of the anvil by means of the coil spring 52 when the convolutions or lock washers will drop off the anvil.

The anvil 39 is provided with a shearing shoulder 54 for cooperating with the shearing member 40 in cutting the lock washers.

Due to the arrangement of anvil and its collet in the plunger 43, the distance that the anvil projects inwardly can be readily varied so that correspondingly the numbers of lock washers formed with each downward movement of theshearing member can be varied.

The shearing member 40 is adjustable inward relative to the coiling device 1 and its mandrel 9 to eliminate the vibration of the coil especially when manufacturing the smaller sizes.

While I have described and shown my machine so positioned that its coiling and shearing devices are operated by a common machine such as a punch press, it is obvious that the mechanism for operating the machine may be built as an integral part of the machine.

hat I claim as my invention is:

1. In a machine for making look washers, the combination with a reciprocating anvil adapted to be engaged by a coil, and means for actuating said anvil, of means for varying the reciprocated movement of said anvil,

and means movable toward said anvil for cutting said coil.

2. In a machine for making lock washers, the combination with a revoluble mandrel of rolls for feeding a metal strip to said mandrel and coiling rolls cooperating with said mandrel to coil the strip about said mandrel, one of said coiling rolls having a radial shoulder adjacent to its bearing surface for engagement with the metal strip and a tapering face extending inwardly from the outer edge of said shoulder for engagement with aportion of the strip after the same has been coiled.

3. In a machine for making lock washers, the combination with a revoluble mandrel, of rolls for feeding a strip to said mandrel, coiling rolls cooperating with said mandrel to coilthe metal strip about said mandrel, means for adjusting said coiling rolls toward or away from their various positions of adjustment, and adjustable means movable transversely of said mandrel for cutting the coiled strip.

4. In a machine for making lock washers, the combination of, an adjustably mounted reciprocatory anvil adapted to be engaged by a coil, of means movable tOWard said anvil for cutting said coil.

5. In a machine for making lock washers, the combination with a mandrel, of means for feeding a metal strip to said mandrel,

means for coiling the strip about said mandrel and for effecting the advance of the forward end of a convolution of the coil, an anvil in substantial axial alignment with said mandrel adapted to receive the coils of said strip, said anvil being adjustable with respect to said coiling means, and means movable transversely of said anvil for cutting the convolution of said coiled strip.

6. In a machine for making lock washers, the combination with a mandrel, of rotatable means for coiling a strip about said mandrel, and an anvil spaced from and in alignment with said mandrel adapted to receive the coils of said strip, said coiling means being movable transversely of the aXis of said anvil.

7. In a machine for making lock washers, the combination with a mandrel, of means for advancing a strip to said mandrel, means for coiling said strip about said mandrel, said coiling means having means for advancing the coils of said strip longitudinally of said mandrel, an anvil adjust able with respect to said mandrel and adapted to receive the coils of said strip, and means cooperating with said anvil for cutting the coils of said strip.

8. In a. machine for making lock washers, the combination with a. mandrel, of an anvil, means spaced from the anvil for coiling a strip about said mandrel andadvancing the coils of said strip onto said anvil, a plunger supporting said anvil, said anvil being adjustable with respect to said plunger, means for actuating said plunger to reciprocate said anvil, and means cooperating with said anvil for cutting the coils of said strip.

9. In a machine of the class described the combination with a mandrel about which a strip is adapted to be coiled, of an anvil adapted to receive the convolutions of said strip, said anvil being adjustable with respect to said mandrel, said mandrel being movable transversely of the axis of said anvil, and a shearing member movable transversely of said anvil for cutting a convolution of said coiled strip.

10. In a machine for making lock washers, the combination with a mandrel, of an anvil, means for coiling a strip about said mandrel and advancing the convolutions of said strip onto said anvil, a plunger sup porting said anvil, said anvil being adjustable with respect to said plunger, and means for actuating said plunger to reciprocate said anvil.

11. In a machine of the class described, the combination with a mandrel about which astrip is adapted to be coiled, of an anvil adapted to receive the convolutions of said strip, and a base upon which both said mandrel and anvil are mounted, said mandrel being movable upon said base transversely of the aXis of said anvil.

12. In a machine for making lock washers, the combination with a mandrel, of rolls for coiling a. strip about said mandrel, rolls for feeding the strip to said coiling rolls, means for adjusting the coiling rolls relative to said mandrel, and a reciprocatory anvil adapted to receive the convolutions of the coiled strip, said anvil being also adjustable with respect to said mandrel.

13. In a machine for making lock washers, the combination with a mandrel, of rolls for coiling a strip about said mandrel, rolls for feeding the strip to said coiling rolls, means for adjusting the coiling rolls relative to said mandrel, a reciprocatory anvil adapted to receive the convolutions of the coiledistrip, said mandrel being adjustable relative to said anvil, and av shearing member adapted to cut the convolutions of the coiled strip on the anvil.

In testimony whereof I afliX my signature.

ALDRICK A. BER-TRAND. 

